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Common tie-in products include literary works, which may be novelizations of a media property, original novels or story collections inspired by the property, or republished previously existing books, such as the novels on which a media property was based, with artwork or photographs from the property. According to publishing industry estimates, about one or two percent of the audience of a film will buy its novelization, making these relatively inexpensively produced works a commercially attractive proposition in the case of blockbuster film franchises. Although increasingly also a domain of previously established novelists, tie-in writing has the disadvantages, from the writers' point of view, of modest pay, tight deadlines and no ownership in the intellectual property created.[1]

Tie-in products may also have a documentary or supplemental character, such or "making-of" books documenting the creation of a media property. Tie-in products also include other types of works based on the media property, such as soundtrack recordings, video games or merchandise including toys and clothing.

A novelization is a derivative novel that adapts the story of a work created for another medium, such as a film, TV series, comic strip or video game. Film novelizations were particularly popular before the advent of home video, but continue to find commercial success as part of marketing campaigns for major films. They are often written by accomplished writers based on an early draft of the film's script and on a tight deadline.

Tie-in novels are often newly published editions of a novel on which a film was based, sometimes renamed to match the film's title and using promotional art created for the film. For example, when Roderick Thorp's 1979 novel Nothing Lasts Forever was adapted into the 1988 film Die Hard, the novel was republished as a paperback tie-in under the Die Hard title with the film's poster on the cover.

Tie-in novels may also continue the story told in the original property, such as the many novels published as part of the Star Wars expanded universe set before or after the events of the original Star Wars film trilogy. In 2015, the New York Times noted the flourishing market for TV series tie-in novels, coinciding with the increasing cultural significance of quality television series. The increasing number of previously established novelists taking on tie-in works has also been credited with these works gaining a "patina of respectability" after having previously been disregarded in literary circles as derivative and mere merchandise.[1]

Some video games are tie-in licences for films, television shows or books.

Video game movie tie-ins are expensive for a game developer to license, and the game designers have to work within constraints imposed by the film studio, under pressure to finish the game in time for the film's release.[2] The aim for the publishers is to increase hype and revenue as the two industries effectively market one another's releases.[3]

Movie license video games have a reputation for being poor quality.[4] For example, Amiga Power awarding Psygnosis's three movie licenses (Dracula, Cliffhanger and Last Action Hero, all reviewed in June 1994) 36% in total; that magazine being cynical towards licensed games in general, with The Blues Brothers being one of few exceptions. One of the first movie tie-in games, Atari's E.T. the Extra-Terrestrial (1982) was deemed so bad, it was cited as one cause of the video game industry crash.[5] Such poor quality is often due to game developers forced to rush the product in order to meet the movie's release date,[5] or due to issues with adapting the original work's plot into an interactive form, such as in the case of the games based on the last two films of the Harry Potter film series, where one reviewer criticised some of the game's missions and side-quests as being unrelated to the film's storyline.[6]

Tie-ins are considered an important part of the revenue-stream for any major media release, and planning, and licensing for such works often begins at the very earliest stages of creating such a property. Tie-ins provide both an important way of generating additional income from a property, and a way of satisfying the desires of fans who enthusiastically support a popular media property.

The lineage of tie-in works can be quite convoluted. For example, a novelization might be done of a video game, which was based on a television show, based on a movie, based on a comic book which was the original media property. In several cases, a novelization has been released based on a movie which was in turn adapted from an original novel. In such cases, it is not uncommon to see the novelization and a movie release of the original novel side-by-side on the same shelf.[citation needed]